All Installation Instructions for LG Microwave LMV1831SW

Microwave fan would come on when door open. Timer and unit would not switch on.

I looked up my problem on the internet and found a very helpful video. Microwave on video was different brand but the internals and methods were very much the same. The video made it simple and easy to fix. Found the replacement switch on the LG parts site and ordered. Two different switch types. One with red switch, the other green. Part was $7.28. Saved a bundle in service costs. Here is the repair video.

https://www.youtube.com/watch?reload=9&v=_AglBJoHgDs

Parts Used:

Microwave Micro Switch

Dick from SANDY, UT
Difficulty Level:
Really Easy
Total Repair Time:
30 - 60 mins
Tools:
Screw drivers

1 person found this instruction helpful.

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microwave turn table not working

Removed the phillips screws from the base.

Using a # 10 secure driver, remove the motor. (I recommend obtaining a secure star driver set to be sure you have the right size)

Replace the spacer, which is a separate part from the motor.

Reinstall the spacer and motor.

Reinstall the bottom panel.

Enjoy!

Parts Used:

Microwave Motor Ac Synchronous

RICHARD from CARY, NC
Difficulty Level:
Easy
Total Repair Time:
15 - 30 mins
Tools:
Screw drivers

1 person found this instruction helpful.

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Door Latch spring keeper broke

Removed door from microwave and then popped the inside widow trim ring off. Removed 4 screws from the window bracket, replaced the latch with a new part and then assembled.

Parts Used:

Microwave Locker

Gregg J. from WEST CHESTER, PA
Difficulty Level:
Easy
Total Repair Time:
15 - 30 mins
Tools:
Screw drivers

3 of 8 people found this instruction helpful.

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Wanted to see the instructions before I install it.

Parts Used:

Microwave Damper

Rene from MORENO VALLEY, CA
Difficulty Level:
Really Easy
Total Repair Time:
30 - 60 mins

2 of 5 people found this instruction helpful.

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Items were not getting heated up in the microwave,

Easy, and the microwave still doesn't work.

Parts Used:

Microwave Micro Switch

Micro Switch

Kenneth from CRYSTAL LAKE, IL
Difficulty Level:
Really Easy
Total Repair Time:
15 - 30 mins
Tools:
Screw drivers

1 of 2 people found this instruction helpful.

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Microwave failed to head and light, fan, and turntable failed to come on.

Problem was due to a faulty door switch. Replaced with a new switch and the microwave now works fine! Only thing that was tricky was that LG uses the hex screws with a peg in the middle to keep the microwave cover on. Had to use a small screwdriver and pliers (on the screwdriver) to unscrew the screws.

Parts Used:

Micro Switch

Robert from Cedar Park, TX
Difficulty Level:
A Bit Difficult
Total Repair Time:
30 - 60 mins
Tools:
Nutdriver, Screw drivers

1 of 2 people found this instruction helpful.

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Microwave operated but did not heat

Initial failure of over range microwave Aug 3rd. Control Panel worked but no heat. Took to local LG authoriaed local repair place. They fixed it quickly and we re-installed it. Worked fine for 2 months then had similar failure again. Agaim took to same authorized repairer. They kept unit for 3 months but finally concluded theu could not fix it and suggested we contact LG for a partial refund. When they tested the unit during re-assembly in my presence, there was a blue flash and the fuse blew. Since we had built a custom tile mural back splash around this unit, I brought it home, ordered a number of time delay fuses new capacitor and two new high voltage diodes. However, using my Fluke DMM, I checked the existing capacitor and high voltage diode and they checked OK so I just replaced the time delay fuse. The high voltage transformer leads had 2 possible ways to connect to capacitor and diode. Tried one way, plugged unit in and turned it on, and immediatly blew the fuse. Replaced the fuse and reversed the high voltage transformer connections,amd turned unit pn, and it worked perfectly. Since we had experienced several power failures during the time of the original failure, the repairer concluded that power spikes might be at fault, so I also purchased a TrippLite ISOBAR4ULTRA 3300 Joule surge protector between wall outlet and microwave, and re-installed over range. It has worked perfectly since.

Parts Used:

Time Delay Fuse

Donald from Oak Ridge, TN
Difficulty Level:
Easy
Total Repair Time:
1- 2 hours
Tools:
Screw drivers

3 of 10 people found this instruction helpful.

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Thermostat needed to be replaced

We had made this determination with the help of a repairman on the phone. I ordered the part and waited for it. It was stuck in West Virginia. After several days after it was expected a repairman fixed my range to the tune of $168. It should have cost $30 (the cost of the part and shipping).
Unfortunately I probably won't order from PartSelect again.

Parts Used:

Microwave Thermostat

Denise from NORTH BEACH, MD
Difficulty Level:
Really Easy
Total Repair Time:
Less than 15 mins
Tools:
Screw drivers

8 of 25 people found this instruction helpful.

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light bulb replacement

very simple

Parts Used:

Light Bulb - 120V 30W

Marianne from CHURCH HILL, MD
Difficulty Level:
Very Easy
Total Repair Time:
Less than 15 mins

9 of 29 people found this instruction helpful.

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No Heat

1. Removed unit from the cabinet. (2 screws). 2. Remove the outer microwave metal shell. (10 screws). 3. Locate and remove part. (3 screws). 4. Install new part and replace all screws. 5. Install unit back into cabinet. So easy. I will share this site with all of my friends.

Parts Used:

Magnetron

Dennis from Chesapeake, VA
Difficulty Level:
Really Easy
Total Repair Time:
15 - 30 mins
Tools:
Screw drivers

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The front glass of the microwave broke, the upper grill broke

To install the door, you need to pull the top grill(molding), remove the inner molding frame from the door. Hold the dor and pull it up to unlock and slide out. To instal new door, simply remove the inside plastic molding and place the for in. Replace the milding to lock it. Instal the upper grill ( molding). The control pannel might give an error at first. Dimply adjust the foor by closing and open several times.

Parts Used: